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Method of removing tacky substance or waste liquid containing tacky substance

a tacky substance and waste liquid technology, applied in the direction of cleaning using liquids, other chemical processes, separation processes, etc., can solve the problems of sticking substance entangled with solid substance, complete burnt, etc., and achieve the effect of convenient packing, efficient and almost completely removed

Active Publication Date: 2006-07-06
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] An object of the present invention is, in the case of removal of a sticky substance or waste liquid containing a sticky substance from a vessel and the like which has been conventionally difficult, to provide a method which makes the removal work easy and can perform also the subsequent burning treatment at low cost and easily.
[0008] In the present invention, since a liquid component is absorbed into and a sticky substance is entangle with such a solid substance, the resulted mixture can be handled as if it is solid. For example, it can be efficiently and almost completely removed from a vessel by a scoop, and then it can be easily packed. Furthermore, the sticky substance entangled with the solid substance after removal from a vessel can be, for example, put into an incinerator and burnt completely. Therefore, the present invention is by far advantageous as compared with cases using noncombustibles such as sand and advantageous from the standpoints of working environments and energy saving as compared with a case using a solvent.

Problems solved by technology

Furthermore, the sticky substance entangled with the solid substance after removal from a vessel can be, for example, put into an incinerator and burnt completely.

Method used

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Examples

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Effect test

example

[0017] As described bellow, the cleaning was performed of a tank for storing waste liquid of a process of continuously synthesizing methyl methacrylate and methacrylic acid, wherein acetonecyanhydrin reacted with sulfuric acid to produce methacrylamide sulfate and then it reacted with water and methanol.

[0018] First, most of the residue in tank was discharged, and the residual liquid containing a sticky polymerized substance mainly composed of methacrylic acid was leaved in tank. The discharged liquid containing a polymerized substance which had stickiness so lower as to be discharged from the tank discharging port under head pressure was received by a basin. Then, a fractured substance made of wood (i.e., sawdust) was dispersed on the discharged liquid in the basin, and they were mixed by a scoop. When the fracture substance made of wood absorbed a liquid component and the sticky polymerized substance mainly composed of methacrylic acid was entangled with the fracture substance ma...

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Abstract

A method of removing a sticky substance or a waste liquid containing a sticky substance which comprises, mixing a solid substance having inflammability and liquid-absorptivity into the sticky substance or the waste liquid containing the sticky substance wherein these are mixed to allow a liquid component of the sticky substance or the waste liquid containing the sticky substance to be absorbed into the solid substance and to allow the sticky substance to be entangled with the solid substance, and then removing the sticky substance together with the solid substance.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of easily removing, for example, waste liquid containing a sticky substance by-produced in a reaction process of petrochemical process, liquid (waste liquid) containing a partially polymerized substance (sticky substance) generated in a process of production and storage of an easily-polymerizable substance. BACKGROUND ART [0002] A sticky substance is by-produced in a reaction process of petrochemical process, and waste liquid containing the sticky substance is extremely difficult to be removed due to its stickiness. Usually, the sticky substance is removed by methods such as dissolving by a solvent. In a process of producing and storing an easily-polymerizable substance, a partially polymerized substance is generated. The process liquid containing the partially polymerized substance (sticky substance) is also removed as waste liquid, usually, by methods such as dissolving by a solvent (see, Japanese Patent Application ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B08B7/00B08B9/00B01D15/00B01D43/00B01J20/24B09B3/00C02F1/28C07B63/00C07C67/56C07C69/54
CPCB01D15/00B09B3/0025B09B3/0033C02F1/28B09B3/21B09B3/20B01D43/00
Inventor MAWATARI, TOMOHIKOSUGIYAMA, MIEZITANIGUCHI, YOSHIYUKI
Owner MITSUBISHI CHEM CORP
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